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furocoumarin/erytem
Länken sparas på Urklipp
Sida 1 från 29 resultat
Furocoumarin sensitization induces DNA-protein cross-links.
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The capacity of some linear and angular furocoumarins to induce DNA-protein cross-links by UVA (320-400 nm) irradiation has been evaluated in Chinese hamster ovary cells. Two linear furocoumarins, psoralen and 8-methoxypsoralen appeared to be capable of inducing DNA-protein cross-links to a
1,4,8-trimethylfuro[2,3-H]quinolin-2(1H)-one, a new furocoumarin bioisoster.
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1,4,8-Trimethylfuro[2,3-h]quinolin-2(1H)-one (compound 5a) is the most interesting derivative among some new furoquinolinones prepared with the aim of moderating the strong toxic effects of 1,4,6,8-tetramethyl derivative (FQ), a powerful potential drug for photomedicine. Compound 5a showed a
4'-Methylangelicin derivatives: a new group of highly photosensitizing monofunctional furocoumarins.
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The photobiological properties of three new angelicin derivatives carrying a methyl-group in 4' position at the furanic ring have been studied. In double-irradiation experiments on E. coli cells, they appeared to behave as monofunctional reactives towards DNA, similarly to the other angelicin
DNA damage induced by 4,6,8,9-tetramethyl-2H-furo[2,3-h]quinolin-2-one, a new furocoumarin analog: biological consequences.
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4,6,8,9-Tetramethyl-2H-furo[2,3-h]quinolin-2-one (HFQ) and its isomer FQ (1,4,6,8-tetramethyl-2H-furo[2,3-h]quinolin-2-one) showed very strong antiproliferative activity in mammalian cells, about two times greater than 8-methoxypsoralen (8-MOP). Both compounds induced DNA-protein cross-links (DPC)
Dietary intake and risk assessment of phototoxic furocoumarins in humans.
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The question of whether the furocoumarin content of vegetables is sufficient to induce phototoxic skin reactions after ultraviolet irradiation was examined in two experiments with four human volunteers. In a first experiment, 300 g of celery roots (total phototoxic furocoumarin content 28.2
Mechanism of action of 4-hydroxymethyl-1,6,8-trimethylfuro[2,3-h]quinolin-2(1H)-one, a very active angular furocoumarin-like sensitizer.
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The molecular structure of 1,4,6,8-tetramethylfuro[2,3-h]quinolin-2(1H)-one (FQ), a recent furocoumarin-like photosensitizer, has been modified with the aim of reducing its strong genotoxicity, by replacing the methyl group at 4 position with a hydroxymethyl one, and so obtaining
Phototoxicity from furocoumarins (psoralens) of Heracleum laciniatum in a patient with vitiligo. Action spectrum studies on bergapten, pimpinellin, angelicin and sphondin.
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Investigations on light reactions in a patient with vitiligo are presented. The minimal erythema dose (MED) in the UVB area was approximately 1/3 of that in persons of skin type II. The application of furocoumarins (psoralens) increased light tolerance by 1 MED at 300-310 nm. Action spectrum studies
Lemons in the Arizona Sunshine: The Effects of Furocoumarins Leading to Phytophotodermatitis and Burn-like Injuries.
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BACKGROUND
Phytophototoxic dermatitis is a strong phototoxic reaction to ultraviolet A (UV-A) radiation exposure after cutaneous contact with citrus fruit containing furocoumarins, leading to skin injury. At the Arizona Burn Center (Phoenix, AZ), the majority of these injuries are managed in the
Assessing phytophotodermatitis: boy with erythema and blisters on both hands.
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Phytophotodermatitis (PPD) is a phototoxic reaction which occurs when the skin comes in contact with a photosensitizer and is subsequently exposed to radiation. PPD is often seen in people handling furocoumarin-containing products, such as agricultural workers, bartenders, florists, and gardeners.
Nine case series with phototoxic dermatitis related to Chenopodium album.
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Chenopodium album L. ssp. album is a common plant species worldwide, especially in humid areas. Sun exposure after oral intake of the plant can lead to sunburn-like rashes owing to its furocoumarin content. In this article, we reported nine patients who developed dermatitis with edema, erythema and
The application of antioxidants in investigations and optimization of photochemotherapy.
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Psoralens (furocoumarins) are photosensitizers of plant origin. They are used in combination with near-ultraviolet (320-400 nm) light for the treatment of vitiligo, psoriasis, cutaneous T-cell lymphoma (CTCL), alopecia areata, eczema, and other skin diseases. Photobiological effects of psoralens in
5-Methoxypsoralen. A review of its effects in psoriasis and vitiligo.
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5-Methoxypsoralen, a naturally occurring linear furocoumarin, has been successfully used in combination with ultraviolet (UV) A irradiation [psoralen plus UV (PUVA)] to manage psoriasis and vitiligo. In patients and volunteers, PUVA 5-methoxypsoralen causes a dose-related increase in cutaneous
[Photobiophysics of furanocoumarins].
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Furocoumarins (psoralens) are photosensitizers of plant origin, which increase the sensitivity of biological objects to near ultraviolet (UV-A, 320-400 nm). In combination with UV-A, they are successfully used for treating many dermal and autoimmune diseases (PUVA therapy and photophoresis). Along
Present aspects concerning the molecular mechanisms of photochemotherapy with psoralens.
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The various photophysical and photochemical events that can be produced by psoralens after their excitation by UV-A radiation are reviewed, with particular reference to their possible significance for induction of photobiological effects. A close correlation has been found between the covalent
Phytophotodermatitis.
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Phytophotodermatitis is a phototoxic cutaneous eruption due to skin exposure to furocourmarins combined with ultraviolet light. Bizzare linear patterns, ranging from erythema to bullae with residual hyperpigmentaion, is the clinical clue to this diagnosis. Avoidance of furocoumarins in direct
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